Calendering-roll



` (No Model.)

' J. BUTTERWORTH.

GALENDBRING ROLL.

. Nro. 578,543. LPatented Mar. 9, 1897.

Witnesses.

` I nventor.

Attorney.

UNrrnD STATES PATENT Ormea.

.IAMES BUTTERWORTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE H. W.BUTTERWORTH & SONS COMPANY, OF PENNSYLVANIA.

CALENDERlNG-ROLL.

SPECIFICATION forming part of Letters Patent No. 578,543, dated March 9,1897'.

Application lecl September 9, 1896. Serial No. 605,269. (No model.)

To @ZZ wwm t may concern.:

Be it known that I, JAMES BUTTERWORTH, of the city and county ofPhiladelphia, State of Pennsylvania, have invented an Improvement inOalendering-Rolls, of which the following is a specification.

My invention has reference to calendering .measure overcome by thecombination of cotton and corn-husks the rolls so constructed lack theuniformity of action found necessary. In rolls of this construction theirregular-sizes and shapes of the corn-husk constituents cause the rollin the complete state to lack that homogeneousness so desirable forperfect work. Its elasticity is not uniform, and it does not respondenough when subjected to a quick blow.

The object of my invention is to produce a calendering or polishing rollwhich shall secure all the advantageous qualities due to elasticity andat the same time embody a homogeneous structure. To secure this, Iemploy an intimate mixture of raw cotton and excelsior ber compressedinto cylindrical shape under hydraulic pressure. The excelsior fiber,being uniform in cross-section and essentially of a curly character,intertwines intimately with the cotton fiber to form a structure ofuniform composition. When this is subjected to heavy pressure, itpermanently retains its shape and close relation, and upon being turneddownin a lathe the polishing-surface thereof will present a uniformstructure. The polishing due to the excelsior fiber will be evenlydistributed, and, furthermore, while being smooth and compact the rollhas the quality of yielding to pressure and quickly recovering from asudden blow. The eXcelsior being a Well-known article of manufacture, itcan be obtained of uniform 5o size, thus insuring uniformity in thecomposition of the calendering-rolls. This uniformity insures in theiinished article a structural character which secures great strength,substantially uniform density, and hence elas- 5 5 ticity, and apolishing capacity of equal value throughout its circumference. Thepossibility of duplicating the polishing-roll is a feature of thegreatest importance, since it frequently happens that the new roll mustbe 6o capable of producing the same polish under the same conditions.This is readily secured by the combination of the uniform eXcelsiorfiber with the cotton fiber, since the two can be most intimately anduniformly com-mingled.

In the drawings, Figure l is an elevation of a calendering-rollembodying my invention. Fig. 2 is a cross-section of same, and Fig. 3 isan end elevation. 7o

A is the shaft or mandrel and has the annular grooves B'.

B is the calender-ing roll or cylinder, and O O are the metal heads orcollars for supporting the fibrous cylinder in position upon themandrel. To hold the collars in position,

I place in the grooves B two semiannular rings F and shrink upon themthe ring G. The cylinder B is made substantially like a tube and isformed in that shape under heavy hy- 8o draulic or other pressure uponthe mandrel. D represents the cotton, andE the eXcelsior. It will beseen from an examination of Fig. 2 that the excclsior is uniformlycommingled or entwined with the cotton fiber. As the cylinder B wearsdown it will always present the same character of surface, but when worndown it must be removed and replaced by a new cylinder. It will thusappear that the necessity of uniformity in the cylinders or 9o rolls ismost 'important and can be secured' when the construction herein set outis followed.

I do not confine myself to any particular lo ishing or oalendering bodycomposed of a fine thread-like Vegetable fiber such as cotton andeXcelsior in a greatly coarser form uniformly intermingled andCompressed into a Solid form.

In testimony of which invention I have lierer 5 unto set my hand.

JAMES BUTITERWORTH. Vitnesses:

R. M. HUNTER, R. M. KELLY.

